Spirometer for medical purposes



FIG. 1 is a front, top, and left side perspective view of a spirometer for medical purposes showing the new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a left side elevation view thereof;

FIG. 8 is an exploded front perspective view of the spirometer shown in FIG. 1 when separated into two parts;

FIG. 9 is a perspective view of the first separated part thereof shown separately for clarity of the illustration; and,

FIG. 10 is a perspective view of the second separated part thereof shown separately for clarity of the illustration.

The broken lines shown in FIGS. 1 and 7-10 views are included for the purpose of illustrating portions of the spirometer for medical purposes that form no part of the claimed design. 

The ornamental design for a spirometer for medical purposes, as shown and described. 